MgB_2超导带材的失超传播特性研究

Study for Quench Propagation Characteristic of MgB_2 Tapes

对MgB2超导带材稳定性的参数—失超传播速度、最小失超传播触发能进行了理论和实验研究。利用数值仿真软件对MgB2超导带材的一维热稳定性进行了仿真,同时,在GM制冷机提供的低温绝热条件下进行了带材失超特性参数的实验测量。实验采用了多点电压检测法,获得了MgB2超导带材的失超传播速度和最小失超传播触发能。实验得到的结果与理论仿真的结果能够很好的吻合。

The thermal stability of MgB2 tapes, including quench propagation velocity and minimum quench propagation triggering energy were investigated experimentally and numerically. Numerical simulations of the quench development and propagation processes in MgB2 tapes were made. The quench parameters of the tapes were measured at low temperature and in adiabatic environment cooled by GM cryocooler. Several voltage taps were attached along the tapes for quench propagation velocity and minimum quench propagation triggering energy measurement. The experimental result is qualitatively consistent with the simulated.